package com.atguigu.springcloud;

import com.netflix.hystrix.contrib.metrics.eventstream.HystrixMetricsStreamServlet;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

import org.springframework.boot.web.servlet.ServletRegistrationBean;
import org.springframework.cloud.client.circuitbreaker.EnableCircuitBreaker;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
import org.springframework.context.annotation.Bean;

/**@EnableHystrix  注解中包含  @EnableCircuitBreaker  使用第一个注解也可以
 * 服务降级  @EnableCircuitBreaker
 */

@EnableEurekaClient
@EnableCircuitBreaker
@SpringBootApplication
public class PaymentHystrixMain8001 {
    public static void main(String[] args) {
        SpringApplication.run(PaymentHystrixMain8001.class,args);
    }


    /**
     * 此配置是为了服务监控而配置，与服务容错本身无关
     * springcloud升级后ServletRegistrationBean因为spring boot的默认路径
     * 不是"/hystrix.stream"
     * 只要在自己的项目里配置上，下面的servlet就可以
     * @return
     */
    @Bean
    public ServletRegistrationBean getServlet() {
        HystrixMetricsStreamServlet streamServlet = new HystrixMetricsStreamServlet();
        ServletRegistrationBean registrationBean = new ServletRegistrationBean(streamServlet);
        registrationBean.setLoadOnStartup(1);
        registrationBean.addUrlMappings("/hystrix.stream");
        registrationBean.setName("HystrixMetricsStreamServlet");
        return registrationBean;
    }
}





